Com3 And Com4 Voltage Jumper; Figure 29: Com3 And Com4 Voltage Jumper Diagram; Table 26: Com3 And Com4 Voltage Jumper Settings - VIA Technologies EPIA-M930 User Manual

3.3 COM3 and COM4 Voltage Jumper

The voltage for COM3 and COM4 is controlled by the jumper labeled as "COMH_S1". The voltage can be either
+5V or +12V. +5V is the default setting. The odd pin numbers correspond to COM3. The even pin numbers
correspond to COM4. The jumper settings are shown below.
+12V
+5V (default)

Figure 29: COM3 and COM4 voltage jumper diagram

+5V (default)
+12V
+5V (default)
+12V

Table 26: COM3 and COM4 voltage jumper settings

1
COM3 Settings Pin 1
Short
Open
COM4 Settings Pin 2
Short
Open
VIA EPIA-M930 User Manual
Pin 3 Pin 5
Short Open
Short Short
Pin 4 Pin 6
Short Open
Short Short
23